I was raised as a JW. My parents and I are a very affectionate family, with regular "I love you"s, hugs and kisses. I enjoy a warm, openly affectionate relationship with my husband.
Maybe it is just the way your boyfriend is.
Is your bf baptised? He may be repressing guilty feelings about you, and it is surfacing as a lack of affection?
If he is still associating with JW's, you will have a rocky road ahead. Even if he is not associating, he will have a lot of sorting out to do in his head. I was not ready to be a good partner to anyone for some years after leaving, and even now my husband has to put up with some baggage.
Good Luck restorebeauty!!